Engineering Transactions, 27, 4, pp. 547-557, 1979

Eddy Viscosity in Accelerated and Retarded Cascade-Wake Flows

J.W. Elsner
Technical University of Częstochowa
Poland

The paper presents the results of both theoretical and experimental analyses of the eddy viscosity evolution behind the row of symmetrical bodies in a cascade flow with a longitudinal pressure gradient having a constant value in a downstream direction. The investigations have proved that eddy viscosity coefficient decreases decidedly with the growth of the coordinate x1. For x1 -> 11 it appears to be the increasing function of the longitudinal pressure gradient.

Full Text: PDF

References

H. SCHLICHTING, Grenzschicht Theorie, G. Braun, Karlsruhe 1965.

H. GÖRTLER, Berechung von Aufgaben der freien Turbulanz auf Grund eines neuen Näherungsansatzes, ZAMM, 22, 5, 1942.

H. REICHARDT, Gesetzmüssigkeiten der freien Turbulenz, VDI Forschungsheft. 414, 1951.

L. S. KOVASZNAY, Hot-wire investigation of the wake behind cylinders at low Reynolds numbers, Proc. Roy, Soc. Ser. A, 198, 1949.

A. A. TOWNSEND, The fully developed turbulent wake of a cylinder, Australian J. Sci. Res., Ser. A, 2, 1949.

A. A. TOWNSEND, Momentum and energy diffusion in the turbulent wake of cylinder, Proc. Roy. Soc., Ser. A, 197, 1048, 1949.

A. A. TOWNSEND, The structure of turbulent shear flow, Emmanuel College, Cambridge 1956.

A. A. TOWNSEND, The mechanism of entraitment in free turbulent flow, J. Fluid Mech., 26, 4, 1966.

R. GRAN OLSSON, Geschwindigekeit und Temperaturverteilung hinter einem Gitter bei turbulenter Strömung, ZAMM, 19, 1936.

R. W. STEWART, An experimental study of homogeneous and isotropic turbulence, Ph. D. Diss., Univ. Cambridge 1951.

H. SATO, On the turbulence behind a row of parallel rods, Proc. 1 sth Japan Nat. Congr. Appl. Mech., 1951.

H. TAMAKI, K. OSHIMA, Experimental studies on the wake behind a row of parallel rods, Proc. 1 sth Japan Nat. Congr. Appl. Mech., 1951.

J. ELSNER, Influence of the initial turbulence of flow on the evolution of wakes behind cascade blades, Arch. Bud. Maszyn, 15, 3, 1968.

J. ElSNER, Uogólnione prawo rozwoju prędkości w turbulentnym anizotropowym strumieniu palisadowym, Ciepl. Masz. Przepł., 71/72, 1970.

F. KLATT, Experimentalle Untersuchungen zur Struktur des Turbulenten Strömungsfeldes im homogenen Gebiet hinter ebenem Turbulenzgittern. Beiträge teoretischen und experimentallen Untersuchung der Turbulenz, Akademie-Verlag, Berlin 1976.

J. ELSNER, J. WILCZYŃSKI, Evolution of Reynolds stresses in turbulent wake-flows with longitudinal pressure gradient, Rozpr. Inżyn., 24, 4, 699-711, 1976.




Copyright © 2014 by Institute of Fundamental Technological Research
Polish Academy of Sciences, Warsaw, Poland